Dynon,
I have done exactly what you say and re-configured with one display only in an attempt to pinpoint the issue to one particular Skyview display. It doesn't make any difference.
On no particular day it will not send in this configuration to the P1 display and another day it will not send to the P2 display in a single Skyview configuration. So I cannot pinpoint the fault to a single display.
The whole problem is that it is not consistant. One day the flightplan transfer will work perfectly and send the flightplan immediately another day it will just not change to 'Send' at all and I do the flight without a flighplan transfer from iPad to Skyview. Or maybe it will take anything between 5-15minutes before it will change to 'Send'. Sometimes it will change to 'Send' but will still not actually send the flightplan.
I still think the problem is an IP network conflict.
The alternative thought is possibly an issue in the Pocketfms EasyVfr App when installed in a twin Skyview setup. I am in email contact with Rob Weijers of Pocketfms who is sympathetic and helpful to my situation and looking in to this possible theory.
This is speculation, since I don't have enough data to come to any conclusion.
I'm assuming the two screens have a single Ethernet cable going to them and you aren't using an Ethernet switch.
It sounds like the EFIS aren't on the same network and each assigning the default master IP address which is the same.
This would imply one of three potential issues:
1. Your Ethernet cable is bad. (i.e. there is an open circuit)
2. The Ethernet cable isn't solidly plugged in until you hear the click
3. You're using a standard Ethernet cable instead of the "null" cable specifically made for connecting two devices together without a switch. Dynon may overcome this issue in software, but most vendors don't. The manual should state the cable requirements.